Composition of matter



Patented June 6, 1933 UNITED STATES PATENT OFFICE 'IBEDEBICK I. DAIITZ,OF IBVINGTON, NEW JERSEY, ASSIGNOR. TO THE OHARVEL CORPORTION, ACORPORATION OF NEW JERSEY COMPOSITION OF MATTER- )!t'o Drawing.

The present invention relates to compositions made of cashew nut shellliquid and hard wood pitch and to method of dissolving and using thelatter material with the first. The compositions and products of theinvention are suitable for impregnating and coating purposes, and areuseful in the arts generally.

The hardwood pitch used in the practice of the present invention has thecharacteristics of being hard, brittle, and non-resilient, and of beingnonmiscible in animal and vegetable oils.

An object of the invention 18 to modify hard wood pitch to overcome itsnatural brittleness, and to overcome its natural nonmiscibility withanimal and vegetable oils.

Other objects and advantages of the invention will appear from thefollowing statement of the invention and from the appended claims.

According to the invention a mixture is made of hard wood pitch andcashew nut shell liquid, the latter being heated to impart dryingcharacteristic thereto. This heating of the cashew nutshell liquid canbe done either before, during or after the mixing with the hard woodpitch can be either comminuted or melted to mix it with the cashew nutshell liquid.

The cashew nut shell liquid is heated preferably between 200 F. andabout 650 F. to impart drying characteristic thereto; and usually adrier is added to aid in the drying or setting thereof. Suitable driersare manganese resinate, lead resinate, manganese oxide, lead oxide, ironoxide, copper oleate or othersor mixtures of any of these.

The proportions of the hard wood pitch and cashew nut shell liquid canbe varied from a small ratio of one, say about five per cent, to theother extreme, to suit various needs.

A particular example (A) of making a product of the present invention isto heat together about three and one-half parts by weight of cashew nutshell liquid and one art of chinawood oil to about 610 F., about threeand one-half per cent of man- Applicatlon filed larch 6,

hard wood pitch. The,

1930.. Serial No. 433,795.

transformer coils, the mixture being put in at the melting or flow pointthereof which is about 210 F.

Another example (B) is to melt together about two parts by weight ofhard wood pitch and one part of cashew nut shell liquid which latter hasbeen heated to about 550 F. to 600 F., about three per cent of manganeseresinate being added. This mixture is suitable for impregnating coilsand fabrics and for other uses.

The time of heating inlexamples (A) and (B) canbe varied to suit thebody desired in the finished composition.

These particular mixtures and others of the invention form a protectivefilm when the cashew nut shell liquid sets or dries and the whole isinsoluble in petroleums, is resilient and strong, and has goodelectrical insulating characteristics.

The two particular examples given above can be used without the drier,manganese resinate, and are useful in such form as an impregnating andfilling compound, among other uses. k

The particular given examples of the invention as well as othercombinations thereof can be taken up with a solvent or thinner whenfirst made up and applied therewith" as a coatin or im re atin com oundand thereafte idried. g p i The drying or setting of the mixtures of theinvention will take place at room temperature, or the drying can behastened by heating to a point below the melting point of the mixture. va

Linseed'oilf castor oil, fish oil, gums and resins, can be used in laceof or with the chinawood oil of the first example and in othercombinations of the. invention to suit various uses, all within thescope of the invention. The gums and resins suitable for use are EastIndia gums, run or select fossil gums, kauri, also synthetic gums of allkinds.

vegetable oils.

The driers, above mentioned and others, are useful in any of the abovecompositions for setting or drying when desired, as is alsoformaldehyde,the latter being suitable alone or with a drier.

When non-drying or semi-drying compositions are desired sulphur can beused in any of the above compositions to give the cashew nut shellliquid a tack which is permanent or recurrent upon increase above normaltemperatures.

Fillers can also be used with the above compositions of the invention.For instance, either of the compositions which are examples (A) or (B),above, can be mixed twenty parts by weight with about eighty parts ofbarytes to make a filling compound for transformer lead bushings. Alsosilica, iron oxide, oleate dust, and so on can be used for fillers.

The above particular examples are given for illustration and it is clearthat various changes in the proportions and combinations can be made inview of the above disclosure.

Having thus described my invention, what I desire to protect by LettersPatent. is:

1. A composition of matter comprising cashew nut shell liquid and hardhardwoo pitch, said pitch bei;1g insoluble in mineral and naturallydrying vegetable oils.

2. A composition of matter comprising cashew nut shell'li'quid modifiedto a drying condition, and hard hardwood pitch, sai

pitch being insoluble in mineral and nat-' 'urally drying vegetableoils.

3. A com osition of matter comprising a natural drymg oil, cashew nutshell liquid, and hard hardwood pitch, said pitch being insoluble inmineral and naturally drying 4. -A composition of matter comprising avegetable oil, cashew nutshell liquid, and hard hardwood pitch, saidpitch soluble in mineral and naturally drying vegetable oils.

5. A composition of matter comprising hard hardwood pitch, cashew nutshell liquid and a drier such as manganese resinate, said pitch beinginsoluble. in mineral and naturally drying vegetable oils.

6. A composition of matter insoluble in petroleums and made, by mixingtogether hard hardwood pitch and cashew nut shell liquid, said pitchbeing insoluble in mineral and naturally drying vegetable oils and saidcashew liquid having been heated between 400 F. and 650 F.

7 A composition of matter insoluble in petroleums and made by mixingtogether hard hardwood pitch, cashew nut shell liquid, and a drier suchas manganese resinate, said pitch being insoluble in mineral andnaturally dr ing vegetable oils and said cashew liqui having been heatedbetween 400 F. and 650 F.

dr ing characteristic.

being in- '8. A composition of matter insoluble in petroleums and. madeby mixing to ether hard hardwood itch, cashew nut she I liquid, andformal ehyde, said pitch being insoluble in mineral and naturally dryingvegetable oils and said cashew liquid having been heated between 400 F.and 650 F.

9. The method which com rises mixing hard hardwood pitch and cas ew nutshell liquid, said pitch being insoluble in mineral and naturally dryingvegetable oils and said cashew ll%l lld being heated in a range between400 and 650 F. to give it a igned this 14th day of February at Irvmgton,New Jersey.

FREDERICK M. DAMITZ.

